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        "author": "Stephen Caudle",
        "author_email": "scaudle@doceme.com",
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            "Development Status :: 5 - Production/Stable",
            "Intended Audience :: Developers",
            "License :: OSI Approved :: GNU General Public License v2 (GPLv2)",
            "Operating System :: POSIX :: Linux",
            "Programming Language :: Python :: 2.6",
            "Programming Language :: Python :: 2.7",
            "Programming Language :: Python :: 3",
            "Topic :: Software Development",
            "Topic :: System :: Hardware",
            "Topic :: System :: Hardware :: Hardware Drivers"
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        "description": "Python Spidev\n=============\n\nThis project contains a python module for interfacing with SPI devices from user space via the spidev linux kernel driver.\n\nAll code is MIT licensed unless explicitly stated otherwise.\n\nUsage\n-----\n\n```python\nimport spidev\nspi = spidev.SpiDev()\nspi.open(bus, device)\nto_send = [0x01, 0x02, 0x03]\nspi.xfer(to_send)\n```\nSettings\n--------\n\n```python\nimport spidev\nspi = spidev.SpiDev()\nspi.open(bus, device)\n\n# Settings (for example)\nspi.max_speed_hz = 5000\nspi.mode = 0b01\n\n...\n```\n\n* `bits_per_word`\n* `cshigh`\n* `loop` - Set the \"SPI_LOOP\" flag to enable loopback mode\n* `no_cs` - Set the \"SPI_NO_CS\" flag to disable use of the chip select (although the driver may still own the CS pin)\n* `lsbfirst`\n* `max_speed_hz`\n* `mode` - SPI mode as two bit pattern of clock polarity and phase [CPOL|CPHA], min: 0b00 = 0, max: 0b11 = 3\n* `threewire` - SI/SO signals shared\n\nMethods\n-------\n\n    open(bus, device)\n\nConnects to the specified SPI device, opening `/dev/spidev<bus>.<device>`\n\n    readbytes(n)\n\nRead n bytes from SPI device.\n\n    writebytes(list of values)\n\nWrites a list of values to SPI device.\n\n    writebytes2(list of values)\n\nSimilar to `writebytes` but accepts arbitrary large lists.\nIf list size exceeds buffer size (which is read from `/sys/module/spidev/parameters/bufsiz`),\ndata will be split into smaller chunks and sent in multiple operations.\n\nAlso, `writebytes2` understands [buffer protocol](https://docs.python.org/3/c-api/buffer.html)\nso it can accept numpy byte arrays for example without need to convert them with `tolist()` first.\nThis offers much better performance where you need to transfer frames to SPI-connected displays for instance.\n\n    xfer(list of values[, speed_hz, delay_usec, bits_per_word])\n\nPerforms an SPI transaction. Chip-select should be released and reactivated between blocks.\nDelay specifies the delay in usec between blocks.\n\n    xfer2(list of values[, speed_hz, delay_usec, bits_per_word])\n\nPerforms an SPI transaction. Chip-select should be held active between blocks.\n\n    xfer3(list of values[, speed_hz, delay_usec, bits_per_word])\n\nSimilar to `xfer2` but accepts arbitrary large lists.\nIf list size exceeds buffer size (which is read from `/sys/module/spidev/parameters/bufsiz`),\ndata will be split into smaller chunks and sent in multiple operations.\n\n    close()\n\nDisconnects from the SPI device.\n\nChangelog\n---------\n\n3.4\n=====\n\n* Changed license to MIT\n\n3.0.1\n=====\n\n* Fixed README.md and CHANGELOG.md formatting, hopefully\n\n3.0\n===\n\n* Memset fix recommended by Dougie Lawson\n* Fixes for Kernel 3.15+ from https://github.com/chrillomat/py-spidev\n* Fixes for Python 3/2 compatibility.\n* Added subclassing support - https://github.com/doceme/py-spidev/issues/10\n\n2.0\n===\n\nCode sourced from http://elk.informatik.fh-augsburg.de/da/da-49/trees/pyap7k/lang/py-spi\nand modified.\n\nPre 2.0\n=======\n\nspimodule.c originally uathored by Volker Thoms, 2009.",
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